Method of manufacturing strip metal bearing stock



May 1938. L. SANDLER 2,117,455

METHOD OF MANUFACTURING STRIP METAL BEARING s-rocx Original Filed Oct. 23, 1935 L a L j 79 7 l f w \I I Q l I i i INVENTOR. Lou/5 50/7d/er m mq ATTORNEYS.

Patented May 17, 1938 PATENT OFFICE METHOD OF MANUFACTURING STRIP METAL BEARING STOCK Louis 'Sandler, New Castle, Pa., assignor to JohnlonBronseCo mpany, New Castle, Pa., a corporation of Pennsylvania Original application October 23, 1935, Serial No.

46,296. Divided and this application June 9,

1937, Serial No. 147,303

IClaims.

My invention relates to an improved method of manufacturing strip metal stock for the production of bearings, relating more particularly to sleeve bearing stock formed of bearing metal having a steel backing. This is a divisional application of my former application Serial No. 46,296, October 23, 1935. A

In the manufacture of such bearings, particularly in the class having a bronze bearing surface. with a steel backing or jacket, it has been generally considered impossible to fuse bearing metal to one side of the backing strip without'also coating with or fusing the bearing material to the outer sides while the steel strip passes through the molten bath, thus making it unfit for use.

I have discovered a method whereby the bearing metal can be readily fused to the one side only of a steel backing strip, and at the same time leave the opposite side as smooth and uncoated as originally. By this method I have overcome the above difllculty as well as cheapened the production of bearing manufacture.

In the accompanying drawing, I-have illustrated my improved method, wherein llkenumerals and letters of reference like parts, in which drawing-- Figure l is a diagrammatie gide elevation-of a device involvinglfeatures to assist-interning out my invention. i

Figure 2 is an enlarged end view of the chamber showing the forming outlet or die therein. 7 l 1 Figure 3 is an endview of a sheet oflmetal such as employed in the method; l

Figure 4 is an end view of the sheet of metal doubled over at its middle longitudinally.

Figure 5 is an end elevation of folded upon itself.

Figure 6 is a similar view with metal applied.

Figure 7 is an end same asp-- arated by removal ofthemar'gin In the practice of-my 'improvdgfmethod, I provide a sheetof steel plate I oi the desired thickness and other dimensions; whichifsthenbent or folded'over at its middle longitudinally upon itself in superposed relation by suitable means, as by passing it between rollers to form it into a laminated strip or member of duallayer; "It is 50 then united along its longitudinal meeting .l' by welding 5-.

After being thus ltpasses up yery'a.

plurality of rollers z and down latch-suitable vessel 3 containing molten bearin metal new fr: to and maintained at the desired temperature h h strip by any suitable means, not shown. The dual strip is then passed through a suitable controlled opening or forming die 4 comprising the slots 5 corresponding in width and thickness to that of the layer of bearing metal to be fused to the steel member, as at 6. As it passes through the die it is engaged by the drawing rollers l2l2.

In continuing the passage of the strip through the lower portion of the outlet or die, which is chilled by suitable means, .as by running water in the space 1: about the lower part of the die, it causes the bearing metal to solidify and form a strip of bearing metal on each outer side of the steel member I of uniform thickness and width, leaving a margin of the steel at the edges.

After the strip or member is thus formed, the margin or longitudinal edges I are removed by suitable cutting means, and when so removed the member I separates into two like laminated members, as shown in Fig. '7.

The'margin on the edge of the steel strip is, as will be apparent, preferred in the passing of the 7 steel backing strip through the die to guide same through the die opening, maintain it in position and cause the bearing metal to be of equal thickness and width throughout as well as have the strips all of like form.

,It will also be apparent that the margin or edges of stock strips may be retained and later removed.

Having thus shown and described my invention, what I claim and desire to secure by Letters Patent, is-- I l. A method of forming dual strip material for the manufacture of bearing strips therefrom, consisting of providing a blank sheet of steel backing, folding the same longitudinally in superposed relation, unitedly sealing the meeting edges thereof, applying a layer of bearing metal to the outer surfaces of said strips by passing the same througha body of molten bearing metal in a container, shaping the said layers on the strip by the strip through a die outlet in the container, and finally chilling the layers of bearin'mgmetal on the strips while passing out of the die. 3

,zn'lhefinethi of forming two like strips of bearing material simultaneously, which consists ,,-in the following steps; providing a sheet of backing steel,,foiding the same longitudinally in sup'erposed relation, unitedly sealing the meeting thereof to form a unit, passing said unit into and through a body of molten bearing metal file-a container to form a layer thereof on the outer-faces of the unit, removing said unit from the container through a shaping outlet beneath the metal body to shape the layers of bearing metal on the unit, and then trimming off the edges of the member to form two like bearing strips.

3. The method of forming two like strips of bearing material simultaneously, which consists in providing a strip of steel, folding the same longitudinally of its middle into flat superposed relation with the edges registering, applying a strip of bearing metal while in a molten state to the two opposite sides leaving a, margin of the steel backing at its longitudinal edges, then removing the margins to separatethe strip into two like 5 parts.

LOUIS SANDLER. 

